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Test scope & comparison notes
These are recorded facts, not a unified ranking. Tested tiers and scope are not consistently recorded. Read pricing with its date and timing with its conditions. Privacy observations reflect visible flows and statements, not a security audit.
Cross-task capability coverage across selected products
Each product is scored independently per task edge; switch tasks below while keeping shared products selected| Task edge | JPEG-Optimizer | WeCompress | Switch / compare |
|---|---|---|---|
| Image compression | 95/100 2048 × 2048 · PNG | 92/100 2048 × 2048 · PNG | Active task |
| PDF compression | Not tested in topic | 96/100 PDF · Output attached | Compare in task topic → |
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Browse this task →| Criterion | JPEG-Optimizer (Browser-Local PNG/JPEG/GIF Compressor) Image compression 95/100 Seven-aspect task score Free login-free on-device processing supports target sizes, retaining full-size PNG with about 62% reduction in this run; display ads occupy the sidebar. Tested export 2048 × 2048 · PNG Historical test · 2026-10-19 | WeCompress (Neuxpower NXPowerLite Online Compressor) Image compression 92/100 Seven-aspect task score Login-free access discloses free size limits, roughly halves this PNG and offers deletion; cloud processing comes with ads and desktop promotions. Tested export 2048 × 2048 · PNG Historical test · 2026-10-19 |
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| Pricing & rules | ||
| Pricing plans | JPEG-Optimizer in-browser bulk image compressor and resizer · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Completely Free Web2026-10-21 ↗ Free Free Free Completely free without login; up to 20 images at once processed locally in the browser for JPEG/PNG/GIF. 1 plan / billing-period records, all listed; — means that period is not recorded. The official page states "Completely Free. 20 images at once." and "Files are NEVER sent to the server, and all processing is handled via your own browser," supporting JPEG/PNG/GIF quality, max KB size, and max dimension settings. Cancellation, sources & verification recordCompletely free in-browser tool with no accounts or paid subscriptions. JPEG-Optimizer official page and privacy notice ↗ · 2026-10-21 Capture 1 ↗ | WeCompress online file and image compressor web tool (excludes separately sold NXPowerLite Desktop software) · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits WeCompress Online Free2026-10-21 ↗ Free Free Free Free without login; max 50 MB per file (supports JPEG/PNG/TIFF and PDF/Office documents) with ad-free, unwatermarked export. 1 plan / billing-period records, all listed; — means that period is not recorded. The WeCompress web tool explicitly states it is free, ad-free, and requires no registration for files up to 50 MB (supporting JPEG, PNG, TIFF, PDF, PowerPoint, Word, and Excel), with automatic deletion after processing. Users needing larger file limits or offline batch compression are directed to the separate NXPowerLite Desktop software. Cancellation, sources & verification recordWeCompress web is completely free with no subscription charges; NXPowerLite Desktop is sold separately by Neuxpower. WeCompress official online file compressor page ↗ · 2026-10-21 Capture 1 ↗ |
| Free & trial allowance on the test date | 100% free with up to 20 images per batch and one-click ZIP download | Free single-file compression up to 50 MB for PNG, JPEG, TIFF, PDF, PPT, Word, and Excel; bulk offline batching requires NXPowerLite Desktop |
| Cancellation & refunds | Completely free in-browser tool with no accounts or paid subscriptions. | WeCompress web is completely free with no subscription charges; NXPowerLite Desktop is sold separately by Neuxpower. |
| Disclosure of costs & limits | Free batch quota and browser-local privacy guarantee are disclosed upfront above the fold | 50 MB file size limit and desktop vs web differences are transparently stated upfront |
| Task quality | ||
| Measured fixture results | File reduction: 61.76% · Output size: 1582.4 KB | File reduction: 50.8% · Output size: 2035.9 KB |
| Fixture findings | Local processing reduced this fixture by about 62%; other formats and images need separate tests. | Reduced this fixture by about 51% without manual settings; findings cover this image test only. |
| Original historical observation | Despite its legacy 'JPEG-Optimizer' name, the tool fully supports client-side PNG, JPEG, and GIF compression. It shrinks our 4.14 MB anchor PNG by 61.76% to 1.55 MB locally in 1.4s with PSNR=39.35 dB and SSIM=0.9984 (02_workspace.png, 03_download.png). | Powered by Neuxpower's mature NXPowerLite engine, WeCompress requires zero manual tuning to cut our 4.14 MB anchor PNG by 50.80% to 2.04 MB while maintaining PSNR=39.65 dB and SSIM=0.9985 (02_workspace.png, 03_download.png). |
| Suitable uses · historical assessment | Privacy-conscious users who strictly prohibit cloud uploads and need fast 20-image batch PNG/JPEG compression in the browser | Office users who prefer a zero-configuration workflow for compressing large images (≤50 MB) alongside PDF, PowerPoint, Word, and Excel files |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | 2048 × 2048 · PNG · No watermark in test | 2048 × 2048 · PNG · No watermark in test |
| Historical specification note · not an official maximum | 2048×2048 (native resolution watermark-free PNG direct export) | 2048×2048 (native resolution watermark-free PNG direct export) |
| Watermark observation | Watermark-free | Watermark-free |
| Batch & API | Supports 20-image batch local compression and ZIP archive export; no external API | Single-file sequential processing on web; desktop app available for bulk offline processing |
| Recorded free-tier dimensions | 2048 × 2048 | 2048 × 2048 |
| Attached file dimensions | 2048 × 2048 · PNG | 2048 × 2048 · PNG |
| Speed & reliability | ||
| Timing observation | Recorded local processing time: 1.4s · End-to-end reference: 1.4s | Network-observed server wait: 4.8s · End-to-end reference: 6.8s |
| Date & fixture | 2026-10-19 · anchor_compress_v1 · US-West (California, AS2914) | 2026-10-19 · anchor_compress_v1 · US-West (California, AS2914) |
| Repeated tests & reliability | No standardized repetition count, success rate or variability range is recorded. | No standardized repetition count, success rate or variability range is recorded. |
| Interaction experience | ||
| Account requirements | No login in this test | No login in this test |
| Sign-in methods | No login required (no account system on site) | No login required |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | One-click quality slider, target max KB, and dimension controls without login; exports directly via a browser blob: URL with only standard sidebar display ads. | Zero-config single-click upload and download; gently recommends NXPowerLite Desktop after download alongside a right-rail Google AdSense banner. |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | JPEG-Optimizer (jpeg-optimizer.com) | Neuxpower Solutions Ltd. |
| Recorded origin | Independent Web Utility | London, United Kingdom |
| Domain history record | 2010–Present (16-year established domain) | Vendor founded in 1997; wecompress.com operating for 10+ years |
| Background & reputation assessment | Long-running web image optimization utility (jpeg-optimizer.com) operating since 2010, modernized with a pure client-side browser processing pipeline. | Operated by Neuxpower Solutions Ltd. (London, UK, founded 1997), creators of the enterprise NXPowerLite compression suite. |
| External reputation record | Not verified | Not verified |
| Engineering & privacy | ||
| Processing location | On-device processing | Uploaded for cloud processing |
| Third-party tracking record | Not verified | Not verified |
| Engineering & privacy assessment | Explicitly promises and verified via network inspection: 'Privacy: Files are NEVER sent to the server, and all processing is handled via your own browser.' 100% client-side zero-upload execution. | ISO/IEC 27001 certified infrastructure with one-click manual cloud deletion and automatic short-term file purging. |
| Retention statement | This flow runs locally; post-close deletion not independently verified | Explicit retention period unconfirmed; inspect policy record |
| Evaluation basis | ||
| Pricing transparency | 33.5 / 35 Clearly states 'Completely Free. 20 images at once.' on the landing page (01_landing.png) with zero paywalls, zero sign-up gates, and zero hidden limits; importing our 4.14 MB anchor PNG immediately generates a free local Download link and ZIP batch archive button (02_workspace.png, 03_download.png). | 32.5 / 35 Clearly states free no-login compression for files up to 50 MB on the landing page (01_landing.png); uploading our 4.14 MB anchor PNG immediately displays '4.04 MB ➔ 1.99 MB (51%)' and a free download button with zero paywalls (02_workspace.png, 03_download.png). |
| Interaction restraint | 27.5 / 30 One-click quality slider, target max KB, and dimension controls without login; exports directly via a browser blob: URL with only standard sidebar display ads. | 26.5 / 30 Zero-config single-click upload and download; gently recommends NXPowerLite Desktop after download alongside a right-rail Google AdSense banner. |
| Background & reputation | 18 / 20 Long-running web image optimization utility (jpeg-optimizer.com) operating since 2010, modernized with a pure client-side browser processing pipeline. | 19 / 20 Operated by Neuxpower Solutions Ltd. (London, UK, founded 1997), creators of the enterprise NXPowerLite compression suite. |
| Engineering & privacy | 15 / 15 Explicitly promises and verified via network inspection: 'Privacy: Files are NEVER sent to the server, and all processing is handled via your own browser.' 100% client-side zero-upload execution. | 13.5 / 15 ISO/IEC 27001 certified infrastructure with one-click manual cloud deletion and automatic short-term file purging. |
| Task quality | 61.2 / 65 Preserves native 2048×2048 PNG format at default 80% quality while shrinking 4,137.9 KB down to 1,582.4 KB (61.76% reduction, 2.61× ratio) with PSNR = 39.35 dB and SSIM = 0.9984 (61.2/65) | 59.8 / 65 Preserves native 2048×2048 PNG format while reducing 4,137.9 KB to 2,035.9 KB (50.80% reduction, 2.03× ratio) with high PSNR = 39.65 dB and SSIM = 0.9985 (59.8/65) |
| Deliverable specifications | 20 / 20 100% preserves 2048×2048 pixel dimensions and native PNG format without watermarks or login (20.0/20) | 20 / 20 100% preserves 2048×2048 pixel dimensions and native PNG format without watermarks or login (20.0/20) |
| Processing speed | 13.8 / 15 100% local browser computation (0s network upload), completing 4.14 MB PNG compression in ~1.4s (13.8/15) | 12.2 / 15 Cloud NXPowerLite engine completes upload and compression in ~6.8s (~4.8s server processing) (12.2/15) |
